With the rising voices of
environmental protection in various countries, the current printing factories in
various countries are facing a lot of "green pressure."
New vegetable oil ink
change the printability of vegetable oil inks, the chemistry of the solvent
(vegetable oil) must first be changed. In Europe there has been a new vegetable
fat derived from the reaction of fatty acids obtained with soybean oil or
linseed oil with alcohols (methanol, ethanol and isobutanol).
This vegetable fat has the same ink printing properties as mineral oil. Its viscosity ranges from 3 to 15 mPa • s at 23 ¡ã C,
very close to mineral oil, allowing it to easily penetrate into the paper,
greatly increasing ink retention.
The same amount of solvent made with this vegetable fat and
mineral solvent were placed in a 150 ¡æ oven and found
that the volatilization rate of the two is almost the same. At the same time,
the improved vegetable fat has a greater ability to dissolve the resin than
mineral oil, taking into account the rate of fixation, gloss and good
ink-to-water balance, all of which make vegetable oil a superior alternative to
At present, this new type of
vegetable oil cannot completely replace the mineral oil directly as a solvent,
but it can replace a considerable amount of mineral oil in the ink solvent,
accounting for 40% to 50% of the amount of solvent.
New ink application characteristics
Compared with mineral oil ink, the
same amount of water, vegetable oil ink agile reaction to water, stop water
viscosity steady, rapid recovery. Vegetable oil ink on the water intake speed,
absorption is limited. In contrast, mineral oil inks showed a steady decline in
viscosity, stop adding water, ink on water detachment slow and there is
fluctuation. Printing with vegetable oil inks can effectively prevent over
emulsification, density fluctuations and water bars and other failures.
their low viscosity, vegetable oil inks adhere quickly and quickly on all
coated papers, whether on high-speed or low-speed presses. The use of mineral
oil ink, even with the dusting, fixing speed and vegetable oil ink, usually
takes 1 hour.
newspaper readers are often dirty with ink sticky black when reading. This is
because the ink on the substrate after printing with conventional ink can
easily be erased. Vegetable oil ink can be a good solution to this problem. Its
wear resistance is better than mineral oil, because the fatty acid ester in
vegetable oil contains unsaturated bond, the ink is easily oxidized and
conjunctiva after it is printed on the material, so that the ink is firmly
fixed on the printing material. The mineral oil on the contrary, its chemical
stability, there will be no reaction, it is difficult to conjunctiva.
4. Printing ink
Because vegetable oil inks can
show a thicker and brighter color effect, you can save ink, reduce printing
costs, and increase unit yields by 10% to 15%.
5 light fastness, heat resistance
Vegetable oil ink boiling point is
much higher than the volatile components of oil, when the laser printer or
copier heating, will not be volatile and stick to the paper, it will not
pollute the machine parts.
6. The double-sided printing
Because of this new vegetable oil
has particularly good stability, solubility, non-volatile and moderate
viscosity characteristics, which is particularly suitable for double-sided
printing. In the printing process, the just-printed side should immediately
flip the roller contact with the back, in order to prevent printing graphics
stick to the roller, ink fixing speed neither too fast, nor in the end of the
printing caused by rub dirty. However, this new solvent system can provide many
7. Environmental performance
Vegetable oil does not contain
organic volatile aromatic polycyclic hydrocarbons and other harmful substances,
is non-toxic solvents, is conducive to human health and prevent air pollution.
In addition, it has been found that vegetable oil ink is easier to
de-inked and has less fiber loss than conventional mineral oil in the recovery
of waste paper, and the deinked waste ink is more likely to degrade compared to
mineral oil inks (since most plant oils decompose spontaneously, Can be
decomposed, while the petroleum distillate material does not work), this
feature is very beneficial for waste paper recycling and drainage.